def print_menu():
    print('='* 30)
    print('学生管理系统 V10.0')
    print('1.添加学生信息')
    print('2.删除嘘声信息')
    print('3.修改学生信息')
    print('4.查询所有学生信息')
    print('0.退出系统')
    print('=' * 30)
def add_stu_info():
    new_name = input('请输入新学生的姓名;')
    new_sex = input('请输入新学生的性别：')
    new_phone = input('请输入新学生的手机号码：')
    new_info = dict()
    new_info['name']=new_name
    new_info['sex']=new_sex
    new_info['phonr']=new_phone
    stu_info.append(new_info)
def del_stu_info(student):
    del_num = int(input('请输入要删除的序号：')) - 1
    del student[del_num]
    print("删除成功！")
def modify_stu_info():
    if len(stu_info) !=0:
        stu_id = int(input('请输入要修改学生的序号：'))
        new_name = input('请输入要修改学生的姓名：')
        new_sex= input('请输入要修改的学生的性别:(男/女)')
        new_phone = input('请输入要修改学生的手机号码:')
        stu_info[stu_id -1]['name'] = new_name
        stu_info[stu_id -1]['sex'] = new_sex
        stu_info[stu_id -1]['phone'] = new_phone
    else:
            print('学生信息表为空')
def show_stu_info():
    print('学生的信息如下：')
    print('=' * 30)
    print('序号     姓名       性别        手机号码')
    i =1
    for tempInfo in stu_info:
        print("%d   %s  %s  %s" % (i, tempInfo['name']),
                tempInfo['sex'], tempInfo['phone'])
        i +=1
def main():
    while True:
        print_menu()
        key = input("请输入功能对应的数字：")
        if key =='1':
            add_stu_info()
        elif key =='2':
            del_stu_info(stu_info)
        elif key =='3':
            modify_stu_info()
        elif key =='4':
            show_stu_info()
        elif key =='0':
            quit_confirm = input('亲，真的要退出码？(Yes or No):').lower()
            if quit_confirm == 'yes':
                print("谢谢使用！")
                break 
            elif quit_confirm == 'no':
                continue
            else:
                print('输入有误！')